US4243755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of reinforced polyurethane foams
Assignee: BASF SE
•
Filing: 1979-11-13
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Granted: 1981-01-06
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Expires: 1999-11-13
Abstract
Abstract The invention relates to a process for the manufacture of reinforced polyurethane foams based on the reaction of organic polyisocyanates and polyols in the presence of filler dispersions. These dispersions are prepared by in situ crushing of the filler in the polyisocyanate or polyol to a particle size of less than 7 microns.
Inventors
- 👤 Matthias Marx
- 👤 Dietmar Nissen
- 👤 Wolfgang Jarre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:36
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0066; C08J9/0061; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
68 words
A process for the manufacture of reinforced foamed polyurethane plastics based on organic polyisocyanates, polyols, fillers, catalysts, foaming agents and possibly chain extending agents and additives wherein fine particle dispersions are used as fillers, said fillers are produced by in situ crushing with high local energy density to particle sizes of less than 7 microns and simultaneous dispersion of organic and/or inorganic fillers and polyols or organic polyisocyanates.
Claim 2
Dependent Claim
68 words
A process for the manufacture of reinforced foamed polyurethane plastics based on organic polyisocyanates, polyols, fillers, catalysts, foaming agents and possibly chain extending agents and additives wherein fine particle dispersions are used as fillers, said fillers are produced by in situ crushing with high local energy density to particle sizes of less than 7 microns and simultaneous dispersion of organic and/or inorganic fillers and polyols or organic polyisocyanates.
Claim 3
Dependent Claim
19 words
The process according to claim 1 wherein the local energy density is 50 to 3000 kilowatts per cubic meter.
Claim 4
Dependent Claim
15 words
The process according to claim 1 wherein the particle size is 0.01 to 7 microns.
Claim 5
Dependent Claim
13 words
The process according to claim 1 wherein inorganic fillers are used as fillers.
Claim 6
Dependent Claim
29 words
The process according to claim 4 wherein silicates, metallic oxides, metal salts, inorganic pigments, glass, asbestos meal or mixtures of the referenced filling materials are used as inorganic fillers.
Claim 7
Dependent Claim
17 words
The process according to claim 1 wherein coal and organic pigments are used as organic filler materials.
Claim 8
Dependent Claim
13 words
The process according to claim 1 wherein polyols are used as dispersing medium.
Claim 9
Dependent Claim
30 words
The process according to claim 7 wherein polyester polyols and/or polyether polyols having molecular weights of 200 to 8000 and hydroxyl numbers of 15 to 800 are employed as polyols.
Claim 10
Dependent Claim
11 words
The process according to claim 8 wherein polyether polyols are employed.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |